package com.atguigu.gulimall.gateway.config;

import com.alibaba.csp.sentinel.adapter.gateway.sc.callback.BlockRequestHandler;
import com.alibaba.csp.sentinel.adapter.gateway.sc.callback.GatewayCallbackManager;
import com.alibaba.fastjson.JSON;
import com.atguigu.common.exception.BizCodeEnume;
import com.atguigu.common.utils.R;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.web.reactive.function.server.ServerResponse;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Configuration
public class SentinelGatewayConfig {

    public SentinelGatewayConfig() {
        GatewayCallbackManager.setBlockHandler(new BlockRequestHandler() {
            //网关限流了请求 就会调用此回调 Mono Flux响应式编程
            @Override
            public Mono<ServerResponse> handleRequest(ServerWebExchange serverWebExchange, Throwable throwable) {

                R error = R.error(BizCodeEnume.TOO_MANY_REQUEST_GATEWAY.getCode(), BizCodeEnume.TOO_MANY_REQUEST_GATEWAY.getMsg());
//                String errJson = JSON.toJSONString(error);

                Mono<ServerResponse> body = ServerResponse.ok().contentType(MediaType.APPLICATION_JSON).body(Mono.just(error), R.class);

//                Mono<ServerResponse> body = ServerResponse.ok().body(Mono.just(errJson), String.class);
                return body;
            }
        });
    }
}
